DEVELOPMENT OF HOT-CORROSION-RESISTANT ALLOYS FOR MARINE GAS TURBINE SERVICE.
Abstract
A program was initiated to develop improved hot-corrosion-resistant alloys for Naval gas turbines. Two series of nickel-base alloys and one series of cobalt-base alloys plus appropriate commercial alloys were studied for possible service as blades and vanes, respectively. Hot-corrosion testing was conducted in two simulated gas turbine burner rigs, one designed particularly for this program. Test variables of temperature, air/fuel ratio, specimen configuration, and atomization effects have been studied using combusted diesel fuel and fixed amounts of sulfur and with salt injected. Proper conditions to achieve reproducible and discriminating hot-corrosion attack have been established. Relative behavior of both experimental and commercial alloys have been determined. The effects of individual element additions appear to have been identified in certain instances; in other cases, compositions were too complex for such separation. Thus, the effects of several elements in nickel-base alloys appear clear, but longer-time testing is recommended for cobalt-alloys. Mechanical properties and microstructures of alloys designed for this program are studied and reported. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 21, 1966
- Accession Number
- AD0629786
Entities
People
- Adrian M. Beltran
- Chester T. Sims
- Paul A. Bergman
Organizations
- General Electric